Temperature-stabilized opto-mechanical oscillator

An optomechanical oscillator, comprising:

• a first laser light source, emitting a first light beam at a first wavelength;
• a resonator configured to oscillate at a resonant frequency, the resonator being configured to be optically coupled to the first light beam, in a first coupling passband containing the first wavelength, so that the resonator collects a fraction of the light propagating in the first beam, said fraction of light being modulated at the resonant frequency;
• a processing circuit, configured to:
• receive, as input, the first light beam having propagated along the resonator;
• generate a feedback signal intended to be fed to the resonator;
• form, by way of output, an output signal that is amplitude modulated, at a modulation frequency corresponding to the resonant frequency;
• wherein the processing circuit comprises:
• a photodetection circuit, forming the input of the processing circuit, and configured to detect at least a first part of the first light beam so as to form a detection signal that is frequency modulated at the resonant frequency, the processing circuit being configured to form the output signal depending on the detection signal;
• a low-pass filter, connected to the photodetection circuit and configured to form a correction signal, at a frequency lower than the resonant frequency, the correction signal being representative of a temperature variation of the resonator;
• a corrector, connected to the low-pass filter and configured to correct the modulation frequency of the detection signal depending on the correction signal.